The Meaning of Fractions (Contemporary's Number Sense:

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And since the first number that needs that column in order to be written numerically is the number ten, we simply say "we will use this column to designate a ten" -- and so that you more easily recognize it is a different column, we will include something to show where the old column is that has all the numbers from zero to nine; we will put a zero in the original column. Also it stumped almost all the students in my Univ. of Maryland pre-calculus class, last summer; the math by itself did not cause difficulty.

Pages: 60

Publisher: NTC/Contemporary Publishing Company (April 1990)

ISBN: 0809242265

The Japanese Abacus: Its Use and Theory

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